Inequalities for the difference body of a convex body

Inequalities for the difference body of a convex body
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凸体的差分体的不等式

DOI:
10.1090/s0002-9939-1967-0218972-8
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发表时间:
1967
影响因子:
2.6
通讯作者:
G. Chakerian
G. Chakerian
中科院分区:
数学1区
文献类型:
--
作者:
G. Chakerian

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在下文中,S将表示En中单位球的边界,u是S的可变点(因此u是单位向量或“方向”)。DK边界的极坐标方程为p=p(u),uCS,所以p(u)是DK在u方向上的半径。则p(u)是K的弦的最大长度,也就是K的“直径”的长度。设u表示E中的n维Lebesque测度。然后罗杰斯和谢泼德[5]证明,
In the following, S will denote the boundary of the unit ball in En, and u a variable point of S (so u is a unit vector, or "direction"). The polar equation of the boundary of DK is given by p=p(u), uCS, so p(u) is the radius of DK in the direction u. Then p(u) is the maximum length of a chord of K having direction u-the length of a "diameter" of K having direction u. Let,u denote n-dimensional Lebesque measure in E,. Then Rogers and Shephard [5] proved that